your food when you put your food in a microwave oven. it's essentially cooking the brain. >> reporter: but based on their past statements, the fcc isn't convinced there's a real risk and maintain they "do not endorse the need for consumers to take any precautions to reduce exposure." >> sanjay, your report is -- i've already started using an ear piece. i've completely changed the way i use my cell phone. i've tried not to carry it in my pocket. but i think the thing that surprised me most and caught my attention the most, which i hadn't realized, is that the manufacturers actually tell people in the instruction manual, which i never read, to put -- not to put the cell phone against your ear. >> yeah. you know, that was pretty surprising to us as well. we came upon that particular fact a little bit into the investigation. we'd been talking to the safety experts, talking to people who are dealing with, you know, cell phone safety quite a bit. and then when you read the actual insert that people never read, frankly, that comes with the phone, it does say exactly